Customers can now scan and pay for their shopping using their smartphones

As long as you pay from within the store, there's no need to queues up at the till.

Research by Juniper on behalf of Sainsbury's estimates that 30 per cent of store transactions are set to be contactless by 2020.

Sainsbury's head of digital, Clodagh Moriarty said: "Technology and changing customer shopping habits have transformed the way people buy their groceries.

"Our teams are constantly working hard to bring new convenient shopping experiences to customers and we're delighted to be the first grocery retailer in the UK to offer customers the ability to shop checkout-free."

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